industrial orientation report (9 jul 2012)
TRANSCRIPT
REPORT ON INDUSTRIAL ORIENTATION
WITH
HSL CONSTRUCTOR PTE LTD
PREPARED BY : LIM KIAN NGEE
U1022332H
MAE
REPORT ON INDUSTRIAL ORIENTATION
WITH HSL CONSTRUCTOR PTE LTD
2012
Table of Contents
Abstract .................................................................................................................................... i
Acknowledgement .................................................................................................................. ii
List of Tables ......................................................................................................................... iii
List of Figures ........................................................................................................................ iv
Chapter One
Introduction ................................................................................................................. 1
1.1 Background .................................................................................................... 1
1.2 Objective ........................................................................................................ 2
1.3 Main Job Scope .............................................................................................. 2
Chapter Two
GRP Pipe Lamination ................................................................................................ 5
2.1 Identification and Measurement .................................................................... 5
2.2 Pipe Cutting, Fitting and Angle Measurement ............................................ 10
2.3 Lamination Process ..................................................................................... 12
2.4 Hardness Test .............................................................................................. 15
Chapter Three
GRP Pipe Installation ............................................................................................... 17
3.1 Installation Method ..................................................................................... 17
3.2 Hydrostatic Test ......................................................................................... 19
Chapter Four
Onshore Activity ...................................................................................................... 21
4.1 Excavation ................................................................................................... 21
4.2 Box Culvert ................................................................................................. 22
Chapter Five
Offshore Activity ..................................................................................................... 25
5.1 Dredging Activity ....................................................................................... 25
5.2 Earth Retaining Stabilising Structure (ERSS) ............................................. 26
5.3 Installation of Intake Header ....................................................................... 28
5.4 Vibration Monitoring System ..................................................................... 30
Chapter Six
Conclusion ................................................................................................................ 31
Appendix ............................................................................................................................. A-1
Appendix A ............................................................................................................. A-1
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Abstract
Construction of a power plant consists of several different aspects and
phases. HSL Constructor Pte Ltd had been awarded the contract for
GMR Energy 2x400MW CCP – Offshore Civil Works Project at Jurong
Island by Samsung C&T Corporation. The project site is situated next to
Power Seraya Power Plant.
HSL Constructor Pte Ltd will undertake the following scope of work:
1. Circulating Water Intake Structure
2. Circulating Water Discharge Outfall Structure
3. Dredging
4. Onshore and Offshore Glass-Reinforced Plastic (GRP) Pipe
Installation
5. Intake Pipe Header Installation
6. Temporary Water Circulation (Underground) Piping System
Concrete Box Culvert
The GRP pipeline consists of straight and angled pipes. To form the
required angles, the GRP pipes need to be cut with high accuracy into
pieces first, followed by conducting pipe fitting checks before joining
them back through a process called “Lamination Process”.
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Acknowledgement
I would like to express my gratitude to Deputy Director of HSL
Constructor Pte Ltd, Mr Sing Tian, who has given me the opportunity to
be part of the GMR project team during my 10 weeks of Industrial
Orientation. During my stint with HSL Constructor Pte Ltd, I was given
learning opportunities such as practical on-site experience, situations
which warrant problem-solving and decision-making skills, experiencing
communication exchanges among team members and across disciplines
as well as handling and resolving conflict, which gave me insights on
how a project is executed.
Secondly, I would like to thank my two supervisors, Mr Ye Genjin
(Project Manager) and Mr Gavin Chan (Project Engineer) for their
guidance, teaching and support. From my initial induction 10 weeks ago
till today, I certainly have learnt much pertaining to operations and
safety from them. Their advice and coaching have helped me
considerably in carrying out my work duties.
Thirdly, I am grateful to the GMR project team colleagues for their
patience and guidance. The assistance and suggestions given have
proved helpful and aided me in the planning of my work scope.
Last but not least, I would like to thank my NTU tutor, Assoc Prof Ang
Hock Eng, for taking his time off for a site visit and getting back to me
whenever I have any enquiries.
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List of Tables
Table 1 Onshore Pipe Identification Number (10PAB) .......................... 5
Table 2 Onshore Pipe Identification Number (20PAB) .......................... 5
Table 3 Offshore Pipe Identification Number (SH1/2) ........................... 6
Table 4 Offshore Pipe Identification Number (SH2/2) ........................... 6
Table 5 General Guideline of Lamination Specification ....................... 14
Table 6 Specification of Type of Layers ................................................ 14
Table 7 Specifications of 1 Pass ............................................................ 14
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List of Figures
Figure 1.1.1 GRP Pipe General Layout Plan ........................................... 2
Figure 1.3.1 Onshore Pipe Installation Drawing (10PAB) ..................... 3
Figure 1.3.2 Onshore Pipe Installation Drawing (20PAB) ..................... 3
Figure 1.3.3 Offshore Pipe Installation Drawing (SH1/2) ...................... 4
Figure 1.3.4 Offshore Pipe Installation Drawing (SH2/2) ...................... 4
Figure 2.1.1 Cutting Plan (10PAB and 20PAB) ..................................... 7
Figure 2.1.2 Cutting Plan (Manhole 10PAB) ......................................... 7
Figure 2.1.3 Cutting Plan (Manhole 20PAB) ......................................... 8
Figure 2.1.4 Cutting Plan (SH1/2) .......................................................... 8
Figure 2.1.5 Cutting Plan (SH2/2) .......................................................... 9
Figure 2.1.6 Measurement of GRP Pipe Length ...................................... 9
Figure 2.2.1 GRP Pipe Before Cutting .................................................. 10
Figure 2.2.2 GRP Pipe After Cutting ..................................................... 10
Figure 2.2.3 Tapered GRP Pipe ............................................................. 11
Figure 2.2.4 GRP Pipe Fitting ................................................................ 11
Figure 2.2.5 Measurement of GRP Pipe Angle ..................................... 12
Figure 2.3.1 Voids Filled with Putty (Before Grinding) ........................ 13
Figure 2.3.2 Voids Filled with Putty (After Grinding) .......................... 13
Figure 2.3.3 Lamination Process ............................................................ 15
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Figure 2.4.1 Hardness Test Equipment .................................................. 15
Figure 2.4.2 Hardness Test ..................................................................... 16
Figure 3.1.1 Section View of Bell and Spigot Joint .............................. 17
Figure 3.1.2 “Come-along” Jack and Chain Method ............................. 18
Figure 3.1.3 Complete Installation of GRP Pipe ................................... 19
Figure 3.2.1 Hydrostatic Test Set-up ..................................................... 19
Figure 3.2.2 Hydrostatic Test ................................................................. 20
Figure 4.1.1 Sheet Pole Before and After Excavation ........................... 21
Figure 4.2.1 Layout of Box Culvert ....................................................... 22
Figure 4.2.2 Rebar Being Tied ............................................................... 23
Figure 4.2.3 Formwork Activity ............................................................ 23
Figure 4.2.4 Concreting Activity ........................................................... 24
Figure 5.1.1 Dredging Crane Barge ....................................................... 25
Figure 5.1.2 Dredging Plan .................................................................... 26
Figure 5.2.1 Earth Retaining Stabilizing Structure ................................ 26
Figure 5.2.2 Seabed without ERSS ......................................................... 27
Figure 5.2.3 Seabed with ERSS .............................................................. 27
Figure 5.2.4 Crane with Vibro-hammer ................................................. 28
Figure 5.2.5 Vibro-excavator on Barge ................................................. 28
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Figure 5.3.1 Plan View of Intake Header ............................................... 28
Figure 5.3.2 Leveling Structure System Model ..................................... 29
Figure 5.4.1 Location of PUB Lines from GRP Pipe Installation ......... 30
Figure 5.4.2 Installation of Vibration Monitoring System .................... 30
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Chapter One
Introduction
1.1 Background
GMR Energy 2x400MW CCP Project is the construction of a power
plant that uses seawater to generate electricity. HSL Constructor Pte Ltd
is the Main Contractor for the supply and installation of both the onshore
and offshore GRP pipes.
In what follows, focus will be placed primarily on the GRP pipes (which
I had the opportunity to be more heavily involved in), from preparing the
pipe material for lamination to installation and testing on-site. The report
will also touch on the other onshore and offshore activities required to
facilitate the installation of the GRP pipes, namely excavation to the
required depth and concreting works for onshore installation and
construction of an earth retaining stabilising structure (ERSS) and
dredging for offshore installation.
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1.2 Objective
The GRP pipeline consists of straight and inclined pipes. To create the
bend curves, cutting of the pipes needs to be carried out in accordance
with the cutting plan before they are joined through a lamination process.
1.3 Main Job Scope
The main scope I was assigned to work on is to ensure that the right GRP
pipes are marked accurately before cutting, pipe fitting of the cut pieces
are in accordance with the approved design drawings before proceeding
with lamination. In addition, the occasion arose for me to be involved in
arranging and preparing for lifting operations using an 90 tonne crane
required for shifting and pipe fitting of the GRP pipes.
Onshore GRP Pipe Installation
Offshore GRP Pipe Installation
Figure 1.1.1 : GRP Pipe General Layout Plan
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Figure 1.3.2 : Onshore Pipe Installation Drawing (20PAB)
90° Elbow Joint Lamination
45° Elbow Joint Lamination
45° Elbow Joint Lamination
with Flange
45° Elbow Joint Lamination
Manhole Lamination
90° Elbow Joint Lamination
Manhole Lamination
45° Elbow Joint Lamination
45° Elbow Joint Lamination
with Flange
Figure 1.3.1 : Onshore Pipe Installation Drawing (10PAB)
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Figure 1.3.3 : Offshore Pipe Installation Drawing (SH1/2)
Figure 1.3.4 : Offshore Pipe Installation Drawing (SH2/2)
7.26° Elbow Joint Lamination
Manhole Lamination
7.26° Elbow Joint Lamination
6.71° Elbow Joint Lamination
45° Lateral “Y” Joint Lamination
80° Elbow Joint Lamination
6.16° Elbow Joint Lamination
21° Elbow Joint and Manhole Lamination
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Chapter Two
GRP Pipe Lamination
2.1 Identification and Measurement
The GRP pipes come in different shipments and based on the drawings
of 10PAB, 20PAB, SH1/2 and SH2/2, each piece comes with an
identification number.
S/N Drawing
Number Position Identification Number
Require
Lamination GRP Pipe
1 10PAB 1, 10, 10, 9 220-01, 150-01, 150-02, 130-01 Yes 90° Elbow Joint
2 10PAB 6 20-01 No Straight
3 10PAB 6 20-02 No Straight
4 10PAB 6 20-03 No Straight
5 10PAB 6 20-04 No Straight
6 10PAB 5, 12, 7 100-01, 250-02, 110-01 Yes 45° Elbow Joint
7 10PAB 6 20-05 No Straight
8 10PAB 6, 11, 2 20-06 Yes Manhole
9 10PAB 3, 12, 8 80-01, 250-03, 120-01 Yes 45° Elbow Joint
10 10PAB 4, 12, 10A, 19 90-01, 250-04, 140-01, 230-01 Yes 45° Elbow Joint with
Flange
Table 1 : Onshore Pipe Identification Number (10PAB)
S/N Drawing
Number Position Identification Number
Require
Lamination GRP Pipe
1 20PAB 1, 8, 8, 6 220-02, 210-01, 210-02, 180-01 Yes 90° Elbow Joint
2 20PAB 5, 9, 2 25-03, 240-01 560-01 Yes Manhole
3 20PAB 4, 10, 7 170-01, 250-01, 190-01 Yes 45° Elbow Joint
4 20PAB 3, 10, 8A, 16 160-01, 250-05, 200-01, 230-02 Yes 45° Elbow Joint with
Flange
Table 2 : Onshore Pipe Identification Number (20PAB)
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S/N Drawing
Number Position Identification Number
Require
Lamination GRP Pipe
1 SH1/2 11, 15A, 15B, 6 310-01, 325-01, 325-02, 260-01 Yes 80° Elbow Joint
2 SH1/2 1 10-01 No Straight
3 SH1/2 1 10-07 No Straight
4 SH1/2 1 15-01 No Straight
5 SH1/2 1 15-02 No Straight
6 SH1/2 12, 8, 9, 13 320-01, 280-01, 290-01, 580-01 Yes 21° Elbow Joint and
Manhole
7 SH1/2 10, 7 300-01, 270-01 Yes 6.16° Elbow Joint
8 SH1/2 1 15-03 No Straight
9 SH1/2 1 15-04 No Straight
10 SH1/2 1 15-07 No Straight
11 SH1/2 1 15-08 No Straight
Table 3 : Offshore Pipe Identification Number (SH1/2)
S/N Drawing
Number Position Identification Number
Require
Lamination GRP Pipe
1 SH2/2 1 10-02 No Straight
2 SH2/2 10, 6 410-01, 370-01 Yes 7.26° Elbow Joint
3 SH2/2 1 10-03 No Straight
4 SH2/2 1 10-04 No Straight
5 SH2/2 1 10-05 No Straight
6 SH2/2 1 10-06 No Straight
7 SH2/2 1 15-05 No Straight
8 SH2/2 1, 7, 14 15-06, 380-01, 590-01 Yes Manhole
9 SH2/2 1 15-09 No Straight
10 SH2/2 1 15-10 No Straight
11 SH2/2 1 15-11 No Straight
12 SH2/2 1 16-01 No Straight
13 SH2/2 11, 5 420-01, 360-01 Yes 7.26° Elbow Joint
14 SH2/2 1 16-02 No Straight
15 SH2/2 1 16-03 No Straight
16 SH2/2 12, 4 430-01, 350-01 Yes 6.71° Elbow Joint
17 SH2/2 1 16-04 No Straight
18 SH2/2 8. 3 390-01, 340-01 Yes 45° Lateral "Y" Joint
19 SH2/2 13 440-01 No Straight
20 SH2/2 15A, 15B 450-01, 450-02 No Straight
21 SH2/2 2A, 2B 330-01, 330-02 No Straight
22 SH2/2 9A, 9B 400-01, 400-02 No Straight
Table 4 : Offshore Pipe Identification Number (SH2/2)
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After identifying the GRP pipes that require lamination, pipe marking
needs to be carried out according to the cutting plan. In the instance pipe
marking is not according to the cutting plan, offset marking would be
required, which entails more time and effort. The pipe length is
measured based on the centre line of the GRP pipe.
Figure 2.1.1 : Cutting Plan (10PAB and 20PAB)
Figure 2.1.2 : Cutting Plan (Manhole of 10PAB)
Plan View Side View
Markings on GRP Pipe
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Figure 2.1.3 : Cutting Plan (Manhole of 20PAB)
Figure 2.1.4 : Cutting Plan (SH1/2)
Plan View Side View
Markings on GRP Pipe
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Figure 2.1.5 : Cutting Plan (SH2/2)
Figure 2.1.6 : Measurement of GRP Pipe Length
Centre Line of
GRP Pipe
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2.2 Pipe Cutting, Fitting and Angle Measurement
The GRP pipe will be cut upon confirmation of the constituent pipe
lengths with the cutting plan. After cutting, the GRP pipe will be split
into several parts with reference to the cutting plan. After the fitted end
of the GRP pipe is tapered using bevel method with 45° angle (refer to
Figure 2.2.3), various parts will be fitted according to the required angle.
Figure 2.2.1 : GRP Pipe Before Cutting
Figure 2.2.2 : GRP Pipe After Cutting
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Figure 2.2.3 : Tapered GRP Pipe
Figure 2.2.4 : GRP Pipe Fitting
After fitting, the pipe angle needs to be checked and measured before
proceeding to the lamination process (refer to Figure 2.2.5). This is done
by finding the centre point of the GRP pipe fitted parts through
extending the centre line. If the angle is not in accordance to the cutting
plan, then parts of the GRP pipe will have to be re-adjusted.
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Figure 2.2.5 : Measurement of GRP Pipe Angle
2.3 Lamination Process
After the GRP pipes are fitted according to the drawings (10PAB,
20PAB, SH1/2 and SH2/2), the surface areas to be laminated need to be
grinded to remove hardened resin so as to achieve stronger bonding for
the 1st layer of lamination. Upon completion of grinding, the lamination
process will take place in the following steps:
1. Voids (3-10mm) in between the tapers will be filled with putty.
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Figure 2.3.1 : Voids Filled with Putty (Before Grinding)
2. The putty will polymerize until hardened.
3. Subsequently, excess putty will be removed by grinding.
Figure 2.3.2 : Voids Filled with Putty (After Grinding)
4. Different pipe diameters have different specifications for the
lamination process. Refer to Appendix A for more details of each
specification.
Putty
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S/N Diameter Type of Lamination Total Number of Pass
1 2000 Elbow Joints 8
2 2000 Manhole 19
3 3000 Elbow Joints 16
4 3000 Manhole 3
Table 5 : General Guideline of Lamination Specification
S/N Type of Layer Thickness for 1 Layer
1 CSM 0.5mm
2 Combi 0.8mm
Table 6 : Specification of Type of Layers
5. Each pass of the lamination consists of 7 layers. Apply resin (70%
of unsaturated polyester isophthalic and 30% of styrene monomer)
before lamination and eliminate the air bubbles before the
insertion of each layer. Allow curing of each pass before
proceeding to the next pass. Grind the laminated surface area after
curing.
1st Layer CSM ("E" glass mat and "C" glass veils)
2nd Layer Combi ("E" glass mat and woven roving)
3rd Layer Combi ("E" glass mat and woven roving)
4th Layer Combi ("E" glass mat and woven roving)
5th Layer Combi ("E" glass mat and woven roving)
6th Layer Combi ("E" glass mat and woven roving)
7th Layer CSM ("E" glass mat and "C" glass veils)
Table 7 : Specifications of One Pass
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Figure 2.3.3 : Lamination Process
6. Repeat Step 5 until the required thickness of lamination is
achieved.
2.4 Hardness Test
To ensure the quality of the laminated joints, hardness test must show a
value of 37 and above after the curing of each pass.
Figure 2.4.1 : Hardness Test Equipment
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Figure 2.4.2 : Hardness Test
Hardness Test Value = 50
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Chapter Three
GRP Pipe Installation
3.1 Installation Method
The straight and laminated GRP pipes will be installed according to the
drawings (10PAB, 20PAB, SH1/2 and SH2/2). The installation method
for bell and spigot joints sealing is by double toroidal elastomeric gasket
(O-ring).
The O-ring has a precise compression set to develop the sealing action.
In addition, the bell and spigot joints are equipped with a locking key
and a pressure tap on the outer surface of the bell to allow hydrostatic
testing.
Figure 3.1.1 : Section View of Bell and Spigot Joint
2 O-ring Gasket
Pressure Tap for
Hydro Testing
Bell
Spigot
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The procedure of GRP pipe installation is as follows:
1. Clean the bell, spigot and O-ring thoroughly.
2. Stretch the O-ring over the spigot and position it in the groove.
3. Equalize the tension on the O-ring by pulling it out of the groove
simultaneously on opposite sides of the spigot.
4. Lubricate the surface of the O-ring that is already positioned into
the grooves, as well as the internal surface of the bell.
5. The spigot end of pipe will be guided into the bell end. If the pipe
is fitted, rotate the pipe section in order to have the test nipple on
the bell on the top, and the slots for the lock joint accessible.
6. Tie 2 nylon slings, or ropes, around both the installed bell section
and the spigot. Leave the slings somewhat loose.
7. Connect the appropriate slings on either side of the pipe with a
“come-along” jack and chain running outside of the planks to
avoid damage to the pipe.
Figure 3.1.2 : “Come-along” Jack and Chain Method
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8. Take up the slack on both sides. At the same time, continue to jack
the spigot end into the bell until the end of the bell edge reaches
the insertion limit marked on the spigot end.
Figure 3.1.3 : Complete Installation of GRP Pipe
3.2 Hydrostatic Test
To check if the bell and spigot is sealed up completely, hydrostatic test is
carried out. The pressuring system shall be fitted to the nipple on the
assembled pipe.
Figure 3.2.1 : Hydrostatic Test Set-up
Sling
“Come-along” Jack and Chain
Locking Key
Locking Key Hole
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Hydrostatic test is executed as follows:
1. Unscrew the plug on the nipple.
2. If using compressed air, the maximum test pressure is 5 bar.
3. If using water, the maximum test pressure is 10 bar.
4. Pump in the compressed air or water into the nipple.
5. The pressure will be maintained for 5 minutes.
6. Check for any pressure loss or visible leakage of the joint and
piping system connected to the nipple.
7. Absence of any drop in pressure means a perfect sealing.
8. In the case of failure during the test, the bell and spigot joint must
be dismantled to clean the joint and replace the O-ring.
Figure 3.2.1 : Hydrostatic Test
Pressure Tap Connected to Nipple
Hand Pump
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Chapter Four
Onshore Activity
4.1 Excavation
Excavation needs to be carried out before the GRP pipes can be installed.
The depth of the excavation and ground conditions determine the type of
method to be employed for excavation. Driving sheet piles into the
ground using the vibro-excavator prevents soil from collapsing after
excavation.
Figure 4.1.1 : Sheet Pile Before and After Excavation
Vibro-excavator
Sheet Pile
Sheet Pile
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4.2 Box Culvert
Seawater needs to be discharged back to the sea; the box culvert serves
the function of carrying the seawater.
Figure 4.2.1 : Layout Plan of Box Culvert
The construction of the box culvert is executed as folows:
1. Tie rebar according to approved design.
20PAB
10PAB
Box Culvert
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Figure 4.2.2 : Rebar Being Tied
2. Construct formwork (using plywood to form the shape of box
culvert).
Figure 4.2.3 : Formwork Activity
Rebar
Plywood
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3. Pour concrete into the formwork.
Figure 4.2.4 : Concreting Activity
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Chapter Five
Offshore Activity
5.1 Dredging Activity
Before the installation of offshore GRP pipes, the seabed needs to be
dredged to the required depth.
Figure 5.1.1 : Dredging Crane Barge
The dredging crane barge has a global position system (GPS) and depth
monitoring system to indicate the position and the depth of the seabed.
The dredging activity can be carried out according to the dredging plan
using the above system.
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Figure 5.1.2 : Dredging Plan
Upon completion of dredging, bucket and sounding test will be
conducted to verify the actual depth of the sea bed.
5.2 Earth Retaining Stabilising Structure (ERSS)
To protect Public Utilities Board (PUB) lines and prevent offshore soil
erosion, installation of a earth retaining stabilising structure is required.
Figure 5.2.1 : Earth Retaining Stabilizing Structure
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Figure 5.2.2 : Seabed without ERSS
Figure 5.2.3 : Seabed with ERSS
ERSS
GRP Pipe
PUB Line
GRP Pipe
PUB Line
Soil Erosion Exposed PUB Line
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Two methods are used to install ERSS. The first method uses the crane
with vibro-hammer to drive the sheet piles whereas the second uses
vibro-excavator.
Figure 5.2.4 : Crane with Vibro-hammer Figure 5.2.5 : Vibro-excavator on Barge
5.3 Installation of Intake Header
The purpose of the intake header is to take in seawater from the sea to
generate electricity.
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To install the intake header, the seabed needs to be flattened with a
leveling system. The system consists of a platform, which is guided by 4
poles to move in a direction perpendicular to the seabed whereas the
leveling beam will be guided by the platform to move horizontally so as
to flatten the sea bed (refer to Figure 5.3.2 below for the prototype model
I built to illustrate how the leveling system works).
Figure 5.3.1 : Plan View of Intake Header
Vertical Direction
Horizontal Direction
Leveling Beam
Platform
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Figure 5.3.2 : Leveling Structure System Model
5.4 Vibration Monitoring System
The offshore activities might affect and damage the PUB pipes (Refer to
Figure 5.4.1), therefore it is essential to install a vibration monitoring
system to serve as early detection for prompt remedial action.
Figure 5.4.1 : Location of PUB Lines from GRP Pipe Installation
P U
B
L I
N E
Trench of 6m length
Offshore GRP Pipe
Trench of PUB Line
18m
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Figure 5.4.2 : Installation of Vibration Monitoring System
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Chapter Six
Conclusion
Safety is of utmost importance. It protects people, minimises injury,
provides a safe working environment and controls construction costs.
Implementing a safety program entails proper and early planning for
work activities which ensures the quality of work and that work progress
is according to plan.
Before the execution of a project, it is important to pre-plan the timeline
into different phases. Some phases need to be completed before
proceeding to the next. For instance, installation of GRP pipes requires
the completion excavation and lamination of the pipes first. Hence, it is
important to meet the given datelines of various phases so as to prevent
delay to the project.
High quality of work needs to be guaranteed so as to prevent and reduce
time loss and costs of re-works. Therefore, it is important to go through
and check the work details thoroughly before actual execution.
REPORT ON INDUSTRIAL ORIENTATION
WITH HSL CONSTRUCTOR PTE LTD
2012
32
Effective communication is vital during project execution. It greatly
helps to prevent people from doing extra “double” work and keeps team
members informed of work activities that need to be carried out.
REPORT ON INDUSTRIAL ORIENTATION
WITH HSL CONSTRUCTOR PTE LTD
2012
A-1
References
Appendix A
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-2
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-3
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-4
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-5
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-6
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-7
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-8
REPORT ON INDUSTRIAL ORIENTATION
WITH HSL CONSTRUCTOR PTE LTD
2012
A-9
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-10
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-11
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-12
REPORT ON INDUSTRIAL ORIENTATION
WITH HSL CONSTRUCTOR PTE LTD
2012
A-13
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-14
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-15
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-16
REPORT ON INDUSTRIAL ORIENTATION
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2012
A-17
REPORT ON INDUSTRIAL ORIENTATION
WITH HSL CONSTRUCTOR PTE LTD
2012
A-18